Doorcheck



Oct. 3, 1933. w. F. MOORE 1,929,251

DOORGHECK Filed March 10, 1930 INVENTOR H"? WaZ/aca/Y'Moore BY awgi fiz/ATTORNEYS 50 a small port 16.

Patent ed Oct. 3, 1933 4 UNITED STATES DOORCHECK I 7 Wallace F. Moore,New Britain, Conn., assignor to The American Hardware Corporation, NewBritain, Conn., a corporation of Connecticut Application March 10, 1930.Serial No. 434,726

2 Claims.

v My invention relates to door checks and has special reference to doorchecks of the type in which there is provision of means capable of beingadjusted to permit the door to close rapidly .5 until it is nearclosingposition and then to finally close the door slowly, and has for itsobject to provide a novel and improved check of this character.

In the accompanying drawing,

Figure 1 is a side elevation, partly in section,

of a portion of a door check embodying the features of my invention intheir preferred form;

Fig. 2 is an end view of'the check; Fig. 3 is a detail sectional viewtaken on the .15 line 3-3 of Fig. 2;

125 or cylinder 2, a chamber 4 for the usual door closing spring (notshown), a piston 6 mounted within the cylinder and adapted to move inone direction during the closing of the door and in the oppositedirection during the opening of the door, the piston being provided withthe usual opening controlled by a ball check valve 8. The piston chamberis provided with a by-pass 10 extending longitudinally in the wallthereof having its inner end arranged back of the piston and its outerend adapted to be in communication with the piston chamber through aport 12 arranged close to the end wall of the piston chamber. The port12 is adapted to be opened and closed varying degrees by means of avalve 14 41) of a common construction extending into the outer end ofthe by-pass 10.

The parts above referred to may be of a well known construction.

In accordance with the present invention a 4,5 by-pass 15 is provided inthe wall of the piston chamber parallel with the by-pass 10. Thisby-pass 15 has its inner end arranged back of the piston and its forwardend adapted to be in communication with the piston chamber through Theport 16 is spaced a distance inwardly from the port 12 and is adapted tobe closed by the piston as the door approaches closed position. Acylindrical valve member 18 extends through a bore in the outer end ofthe piston chamber and its inner end portion extends into the outer endof the by-pass 15. The valve -member 18 is provided with a collar 20which is held against a shoulder in the bore through which said memberextends by a packing washer '22 and a packing nut 24 screwed into theouter vat) end of said bore. With this construction, the valve membermay be turned but is held axially fixed, and a tight joint is provided.The outer end of the valve member is provided with a screw-driver slot26.

The inner end portion of the valve member is provided with an axial bore28 and an aperture is made through the valve member so as to providediametrically arranged ports 30 leading outwardly from the inner end ofthe bore 28.17. The ports 30 of the valve member are so arranged thatupon turning the valve so as to position the ports horizontally one orthe other of them registers with the port 16 in the piston chamber, thusopening communication between the piston 175 chamber and the outer endof the by-pass 15. Upon turning the valve member 18 from this positionapproximately ninety degrees, both of the ports30 are positioned out ofalinement with the ports 16 and thus the by-pass 15 is closed.

The screw-driver slot 26 on the outer end of the valve member 18 is soarranged with relation to the ports 30 that when the slot is inhorizontal position the by-pass 15 is open, and when said slot is invertical position the by-pass is closed. Thus one may easily determinethe distance to turn the valve member 18 in either direction to open andclose the by-pass 15.

With this construction upon turning the valve member 18 so as to openthe bypass 15 and '90 properly adjusting the valve 14, as the door isclosed the fluid in advance of the piston is permitted to pass more orless freely out through the ports 12 and 16 so that the door may closerapidly, but when the door approaches closed position, the piston closesthe port 16 whereupon all the liquid must pass out through the port 12so that the door may be caused to finally close slowly.

With the construction above described, a simple and efiicient meansadapted to be accurately adjusted is provided for effecting the desiredresult, namely, to cause the door to close rapidly until it approachesclose to closed position and to finally close slowly.

As the two regulating valves are located in .105 separate passes, theadjustment of one valve will not afiect the flow through the otherby-pass. By providing the two diametrically arranged ports 30, the valvemember may be turned in either direction to open and close the valve,and the position of the valve is determined by the position of thescrew-driver slot therein, so that no difficulty may be experienced inadjusting the valve correctly.

In place of the diametrically opposed ports 30 and axial bore in thevalve member, longitudinally extending grooves 31 may be provided in thevalvemember, the grooves being arranged diametrically opposite eachother (Fig. 6).

As will be evident to those skilled in the art, my invention permitsvarious modifications without departing from the spirit thereof or thescope of the appended claims.

What I claim is:

1. In a door check the combination of a piston, a piston chamber havinga by-pass leading from one end of the cylinder to a point back of thepiston, a valve in said by-pass for controlling the flow of fluidtherethrough, said chamber having a second by-pass separate from thefirst-mentioned by-pass opening into the cylinder at a :point back ofthe piston, a port leading from the interior of said chamber to thesecond-mentioned by-pass and arranged a distance inwardly from the outerend of said first-mentioned by-pass, a valve extending into thesecond-mentioned bypass having a central bore and diametrically artionedby-pass opening into the cylinder at a point back of the piston, a portleading from the interior of said chamber to the second-mentionedby-pass and arranged at a point spaced a distance inwardly from theouter end of said first-mentioned by-pass, and a rotatable valve memberheld from axial movement constructed so when turned in either directioninto one angular posi- .tion opens communication between thesecondmentioned by-pass and its said portand when turned substantiallyninety degreesjfrom said angular position in either directionclosescommunication between the seconde'mentioned by-pass and its said port.

WALLACE F. MOORE.

